		button:link,button:visited{
			color: fuchsia;
			background-color: #808080;
			text-decoration: none;/*none无文本修饰*/
		}
		
		button:hover{
			color:yellow;
			background-color: pink;
			border: aquamarine ;
		}
		
		button:active{
			color: green;
			border: #008000;
		}
		
		#a{width: 90%;
		height: 50px;
		background-color: rgba(255,0,0,0.1);
		text-align: center;
		  margin: auto;}
		
		.a1{width: 150px;
		height: 50px;
		background-color: transparent;
		padding-top: 1px;
		margin-left: 50px;
		float: left;
		font:楷书;
		color: black;
		text-align: center;}
		
		#a2{margin-left: 60px;
		margin-top: 10px;
		float: left;
		color: #FF0000;
		font-weight: 900;
		font-family: "宋体";}
		
		.aa1{border: #000000 0px solid;
		margin:10px auto;
		padding-left:5px;
		font-weight: 900;
		font-size: larger;}
		
		.dd1{width: 70%;
		height: 550px;
		/* border-left: #ffaa00 solid 1px; */
		margin: auto;
		font-size: 1.2em;
		text-align: center;}
		
		#d2{border: #000000 0px solid;
		float: left;}
		
		#d3{margin-left:200px;
		border: #000000 0px solid;
		float: left;}
		
		#dd2{width: 70%;
		height: 560px;
		margin: auto;}
		
		#d4{width: 600px;
			height: 550px;
		/* border: #000000 1px solid; */
		float: left;}
		
		#d5{
			width: 550px;
			height: 550px;
			/* border: #000000 1px solid; */
			float: left;
			margin-left: 100px;}
		
		#d9{position: fixed;
			   right:100px ;
			   top:70px;}
			   
		#D{position: fixed;
			right:130px ;
			bottom:10px;}
			
		body{border-left: #ffaa00 double 5px;}
		
		